Storage Management System, Management Device and Method Therefor

1. A storage management system comprising: at least one processor; and a plurality of modules which are collections of instructions executable by the at least one processor, the modules comprising: a cloud storage comprising a plurality of terminal devices joined in a sharing system, wherein each terminal device comprises storage, and each terminal device designates a portion of its respective storage as a shared storage space for the sharing system; a shared storage space detecting module configured to, upon execution by the at least one processor, cause the at least one processor to detect sizes of the shared storage spaces of the plurality of terminal devices; a classification determining module configured to, upon execution by the at least one processor, cause the at least one processor to perform the following: create a plurality of kinds of terminal device, wherein each kind of terminal device has a different respective shared storage size range; classify each terminal device into one of the plurality of kinds of terminal device so that the shared storage size of the respective terminal device is within the shared storage size range of the respective kind of terminal device; for each respective kind of terminal device, link the corresponding terminal devices to form a respective storage space chain; a mapping module configured to, upon execution by the at least one processor, cause the at least one processor to map each respective storage space chain to a respective one of a plurality of virtual disks in a virtual disk array card, wherein the respective virtual disk has a size equal to the respective storage space chain; a storage controlling module configured to, upon execution by the at least one processor, cause the at least one processor to receive a storing request to store a file to the cloud storage from one terminal device, and determine a size of the file to be stored according to the storing request, and select one virtual disk from the virtual disk array card whose storage capacity is nearest and greater than or equal to the size of the file to be stored, and store the file to the shared storage spaces of the terminal devices mapping to the selected virtual disk.

2. The system according to claim 1 , wherein the terminal devices joined in the sharing system are registered in a storage management device; wherein the shared storage space detecting module detects the shared storage space of one terminal device after the terminal device has registered in the storage management device.

3. The system according to claim 2 , wherein the shared storage space of each terminal device is an idle storage space of the terminal device or a storage space predefined by a user of the terminal device.

4. The system according to claim 2 , wherein the mapping module is further configured to, upon execution by the at least one processor, cause the at least one processor to pre-establish the virtual disk array card in response to user operation and the virtual disks of the virtual disk array card are in a format of redundant array of inexpensive disks.

5. The system according to claim 2 , wherein the storing request is generated in response to an operation of selecting a corresponding menu item of the terminal device, wherein the storing request comprises size information of the file to be stored.

6. A storage management device comprising: a storage device storing a virtual disk array card, wherein, the virtual disk array card comprises a plurality of virtual disks with different storage capacities; and at least one processor configured to execute the plurality of modules, the plurality of modules comprising: a cloud storage comprising a plurality of terminal devices joined in a shared system, wherein each terminal device comprises storage, and each terminal device designates a portion of its respective storage as a shared storage space for the sharing system; a shared storage space detecting module configured to, upon execution of the at least one processor, cause the at least one processor to detect sizes of the shared storage spaces of terminal devices; a classification determining module configured to, upon execution by the at least one processor, cause the at least one processor to perform the following: create a plurality of kinds of terminal device, wherein each kind of terminal device has a different respective shared storage size range; classify each terminal device into one of the plurality of kinds of terminal device so that the shared storage size of the respective terminal device is within the shared storage size range of the respective kind of terminal device; for each respective kind of terminal device, link the corresponding terminal devices to form a respective storage space chain; a mapping module configured to, upon execution by the at least one processor, cause the at least one processor to map each respective storage space chain to a respective one of a plurality of virtual disks in a virtual disk array card, wherein the respective virtual disk has a size equal to the respective storage space chain; a storage controlling module configured to, upon execution by the at least one processor, cause the at least one processor to receive a storing request to store a file to the cloud storage from one terminal device, and determine a size of the file to be stored according to the storing request, and select one virtual disk from the virtual disk array card whose storage capacity is nearest and greater than or equal to the size of the file to be stored, and store the file to the shared storage spaces of the terminal devices mapping to the selected virtual disk.

7. The device according to claim 6 , wherein the terminal devices joined in the sharing system are registered in a storage management device; wherein the shared storage space detecting module detects the shared storage space of one terminal device after the terminal device has registered in the storage management device.

8. The device according to claim 7 , wherein the shared storage space of each terminal device is an idle storage space of the terminal device or a storage space predefined by a user of the terminal device.

9. The device according to claim 7 , wherein the mapping module is further configured to pre-establish the virtual disk array card in response to user operation and the virtual disks of the virtual disk array card are in a format of redundant array of inexpensive disks.

10. The device according to claim 7 , wherein the storing request is generated in response to an operation of selecting a corresponding menu item of the terminal device, wherein the storing request comprises size information of the file to be stored.

11. A storage management method, applied in a storage management device, comprising: creating a cloud storage comprising a plurality of terminal devices joined in a sharing system, wherein each terminal device comprises storage, and each terminal device designates a portion of its respective storage as a shared storage space for the sharing system; detecting sizes of the shared storage spaces of terminal devices; creating a plurality of kinds of terminal device, wherein each kind of terminal device has a different respective shared storage size range; classifying each terminal device into one of the plurality of kinds of terminal device so that the shared storage size of the respective terminal device is within the shared storage size range of the respective kind terminal device; for each respective kind of terminal device, linking the corresponding terminal devices to form a respective storage space chain; mapping each respective storage space chain to a respective one of a plurality of virtual disks in a virtual disk array card, wherein the respective virtual disk has a size equal to the respective storage space chain; receiving a storing request to store a file to the cloud storage from one terminal device, and selecting one virtual disk whose storage capacity is nearest and greater than or equal to the size of the file to be stored, and storing the file to the shared storage spaces of the terminal devices mapping to the selected virtual disk.

12. The method according to claim 11 , wherein the terminal devices joined in the sharing system are registered in a storage management device, wherein the step of detecting sizes of shared storage spaces of terminal devices joined in a sharing system comprises: detecting the sizes of the shared storage space of the terminal devices after the terminal devices have registered in the storage management device.

13. The method according to claim 12 , wherein the shared storage space of each terminal device is an idle storage space of the terminal device or a storage space predefined by a user of the terminal device.

14. The method according to claim 12 , further comprising: pre-establishing the virtual disk array card in response to user operation, wherein the virtual disks of the virtual disk array card are in a format of redundant array of inexpensive disks.

15. The method according to claim 12 , further comprising: generating the storing request in response to an operation of selecting a corresponding menu item of the terminal device, the storing request comprising size information of the file to be stored.